PHILADELPHIA -- It was another Monday without a starting quarterback for the Eagles. For the fourth straight week, coach Chip Kelly could not definitively say who his quarterback would be.
This is what Kelly would say: Michael Vick underwent an MRI exam on his strained left hamstring and Nick Foles was undergoing tests on his concussion, including the ImPACT test.
Kelly said it's unlikely that Vick will play Sunday against the Oakland Raiders, but he did not know the status of Foles. General manager Howie Roseman said the Eagles would have a better idea of Foles' status on Tuesday morning.
After Foles passes the ImPACT test, the baseline measurement of cognitive function, an independent neurologist must clear him before he can resume practice. The Eagles will begin practicing for the Raiders game on Tuesday. If Vick and Foles are absent, rookie Matt Barkley will take the first-team snaps in practice.
"When I get all the information on the health of our quarterbacks, I'll tell you who our starting quarterback is going to be," Kelly said. "If Nick is not cleared, that's another discussion we have to have."
If Vick and Foles are out, the Eagles would need to find a backup quarterback. On their practice squad is G.J. Kinne, who spent the offseason with the team but has never played in a regular-season game.
Then there's the issue of the Eagles' preparation. Barkley has played in relief in the last two games and received a limited number of first-team practice snaps during last week. If he could conceivably start, the first-team snaps would be a major help. That's why Foles' time line is so important, and the uncertainty surrounding Foles' status is problematic.
The coaching staff spent Monday installing first-down and second-down plays for the week's game plan. Kelly insisted that the Eagles' offense does not change much depending on the quarterback. If there are 10 passing plays for first down, they'll see which plays the quarterback prefers, which is the only major variance.
"That's kind of how we've always approached it," Kelly said. "We're not going to change really what we do.The plays Matt ran on Sunday were the same game plans that were in for Mike."
Barkley has completed 60.9 percent of his passes for 287 yards in just over three quarters this season. He has four interceptions and one lost fumble. That fumble came at the end of the first half in Sunday's 15-7 loss to the Giants with the Eagles close to scoring.
The turnover had a major effect on the loss, but Kelly otherwise saw encouraging signs from Barkley. He called the fumble a "bad decision" and said the rookie knows a mistake was made, but Kelly did not think Barkley played poorly.
"I think he's got a good understanding of what we're doing," Kelly said."He puts the ball on people, gave the guys a chance to run after the catch.I think he's got a bright future."
The revolving door behind center is the team's biggest problem, but it's not the only problem.
The Eagles have not scored an offensive touchdown in two games. An attack that was among the most explosive in the NFL early in the season has since stagnated, although Kelly did not believe that the league has adjusted to his system.
"I don't think people have figured out" the offense, Kelly said. "It's still about executing. ... You're not going to surprise people eight games into the season. We have to run the right depth on our routes. We have to catch the ball when it's thrown to us. We have to put the ball on people when people are open. We have to hit the hole when the hole is there. We have to create a hole if the hole is not there. That's just executing football."
With instability at quarterback, Kelly said the offense needs to lean "on something else that can help us get through those murky waters." That has not happened. The running game has struggled, and the receivers are not making enough of a difference.
The top two playmakers on the Eagles' offense are running back LeSean McCoy and receiver DeSean Jackson, neither of whom had standout performances during the last two weeks.
But their production can sometimes rely on who plays quarterback. Another Monday has passed without a clear answer to that question.
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